JPH0767221A - Gas insulated switchgear - Google Patents

Abstract

PURPOSE:To protect the surface of an insulator against dielectric breakdown in the gas at the time of internal inspection of a circuit breaker by opening a disconnector after opening the circuit breaker, discharging the insulation gas from an enclosure, detecting a predetermined value thereof by means of a detection switch, throwing in a ground unit by a first control means and throwing the circuit breaker by a second control means. CONSTITUTION:A plurality of interrupting sections 2, each comprising a pair of opposing contactors, are disposed in a first enclosure 1 filled with insulation gas. It is supported by a supporting member 3. When the interrupting section is opened, a voltage dividing capacitor 5 makes the potential distribution at each part as smooth as possible. A contactor 10 and a second enclosure 9 constitute a disconnector 11 and a ground unit 12 is disposed on the pole side thereof. Another ground unit 14 is disposed on the pole side connected with the disconnector 11. Insulation gas is then discharged from the first enclosure 1 through a valve 16. This structure protects the surface of an insulator against dielectric breakdown due to charges on the conductor and supporting member in the circuit breaker at the time of inspection thereof.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】この発明は、ガス絶縁開閉装置に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas insulated switchgear.

【０００２】[0002]

【従来の技術】ガス絶縁開閉装置の長期使用に際して
は、当該装置の絶縁ガスを回収して内部点検をする場合
がある。特に、電流の開閉により消耗が激しいしゃ断器
の場合は、上記のような内部点検が必要となる。図８は
通常のガス絶縁開閉装置のしゃ断器近傍の一般的な構成
図を示す。これと同様な構成は三菱電機カタログ『三菱
全三相一括形ＧＩＳ』Ａ−Ｃ7517−Ｂ（1992年９月発
行）の図１がある。図において、１は絶縁ガスを充填し
た第１の密封容器、２は第１の密封容器１内に配設され
互いに接離可能に対向して設けられた一対の接触子を有
する複数のしゃ断部で、直列に接続されている。３は複
数の遮断部２を接続し支持する支持部材、４は第１の密
封容器１に取付けられ支持部材３を支持する絶縁支持部
材、５はしゃ断部２が開路した場合、各々の電位の分布
をできるだけ均一にするための分圧コンデンサである。
なお、第１の密封容器１、しゃ断部２、支持部材３、絶
縁支持部材４、分圧コンデンサ５でしゃ断器６が構成さ
れている。７はしゃ断器５の各々の導出端子に電気的に
接続された導体、８は導体７を絶縁支持する絶縁スペー
サ、９は第１の密封容器１の両側に絶縁スペーサ８を介
して取付けられ絶縁ガスを充填した第２の密封容器、10
は第２の密封容器９内に配設され一極側が各々の導体７
に接続され他極側が図示していない他の機器に接続され
た接触子である。なお、第２の密封容器９と接触子10で
断路器、11が構成されている。12は各々の断路器11の導
体７に接続された極側に設けられた接地装置。13は接地
装置12の接触子、14は各々の断路器11の図示されない他
の機器に接続された極側に設けられた接地装置、15は接
地装置14の接触子、16は第１の密封容器１内に連通し、
第１の密封容器内の絶縁ガスを排出するバルブ、17はバ
ルブ16に接続され絶縁ガスを回収するガス回収装置、18
は第１の密封容器１に設けられた点検口である。2. Description of the Related Art When a gas-insulated switchgear is used for a long period of time, the insulating gas of the device may be collected for internal inspection. In particular, in the case of a circuit breaker that is heavily consumed due to the opening and closing of current, the above-mentioned internal inspection is required. FIG. 8 shows a general configuration diagram in the vicinity of a breaker of a normal gas insulated switchgear. A configuration similar to this is shown in Fig. 1 of the Mitsubishi Electric catalog "Mitsubishi All Three-Phase Collective GIS" A-C7517-B (issued in September 1992). In the figure, 1 is a first hermetic container filled with an insulating gas, 2 is a plurality of cut-off portions arranged in the first hermetic container 1 and having a pair of contacts provided facing each other so that they can come in contact with and separate from each other. And are connected in series. Reference numeral 3 denotes a support member that connects and supports a plurality of blocking portions 2, 4 an insulating support member that is attached to the first sealed container 1 and that supports the support member 3, and 5 a potential of each potential when the blocking portion 2 is opened. It is a voltage dividing capacitor to make the distribution as uniform as possible.
The first hermetically sealed container 1, the breaking unit 2, the supporting member 3, the insulating supporting member 4, and the voltage dividing capacitor 5 constitute a breaking unit 6. Reference numeral 7 is a conductor electrically connected to each lead-out terminal of the breaker 5, 8 is an insulating spacer for insulating and supporting the conductor 7, and 9 is mounted on both sides of the first sealed container 1 via the insulating spacers 8 for insulation. Second sealed container filled with gas, 10
Are arranged in the second hermetically sealed container 9 and each pole 7 has one conductor 7
Is a contactor that is connected to the other side and is connected to another device (not shown) on the other pole side. The second hermetically sealed container 9 and the contact 10 constitute a disconnector 11, 11. 12 is a grounding device provided on the pole side connected to the conductor 7 of each disconnector 11. Reference numeral 13 is a contactor of the grounding device 12, 14 is a grounding device provided on the pole side of each disconnector 11 connected to another device (not shown), 15 is a contactor of the grounding device 14, and 16 is a first seal. Communicating with the container 1,
A valve for discharging the insulating gas in the first sealed container, 17 is a gas recovery device connected to the valve 16 for recovering the insulating gas, 18
Is an inspection port provided in the first sealed container 1.

【０００３】次に、図８のようなガス絶縁開閉装置にお
けるしゃ断器６の内部点検時の動作について説明する。
最初にしゃ断器６のしゃ断部２を開路して通電電流を切
った後に、断路器11の接触子10を開離して、しゃ断器６
を電気的に切離す。次に第１の密封容器１内の絶縁ガス
を排出するためにバルブ16にガス回収装置17を接続し、
バルブ16を開く。第１の密封容器１内のガスは、数Torr
といった真空になるまで回収される。その後点検口18を
開き第１の密封容器１内に十分空気を送り込み、しゃ断
器６の内部点検をするが、電気的安全を図るため、点検
口18を開く前に必ず接地装置12の接触子13を投入する。Next, the operation of the circuit breaker 6 in the gas insulated switchgear shown in FIG. 8 during the internal inspection will be described.
First, the circuit breaker 2 of the circuit breaker 6 is opened to cut off the energizing current, and then the contact 10 of the circuit breaker 11 is opened to break the circuit breaker 6.
Electrically disconnect. Next, a gas recovery device 17 is connected to the valve 16 in order to discharge the insulating gas in the first sealed container 1.
Open valve 16. The gas in the first sealed container 1 is several Torr.
It is collected until it becomes a vacuum. After that, the inspection port 18 is opened and sufficient air is sent into the first sealed container 1 to inspect the inside of the circuit breaker 6. However, for electrical safety, the contactor of the grounding device 12 must be opened before opening the inspection port 18. Turn on 13.

【０００４】接地装置12の投入時点の違いは以下のよう
な作用をもたらす。即ち、しゃ断器６内のガス圧が低下
してから接地装置12を投入すれば、導体７に残留した電
荷による電圧のため、しゃ断器６内のガス絶縁部分で絶
縁破壊を起こすことがある。又、しゃ断器６内のガス圧
が高い間に接地装置12が投入されたとしても、しゃ断部
２の接触子が開かれたままの場合、浮遊電極となる支持
部材３の部分には、時間が少し過ぎるとコンデンサ５や
絶縁支持部材４に蓄積された電荷が集まり、わずかに電
圧を生じる。しゃ断器６内のガス圧は数Torrといった真
空状態になるまで回収されるので、上記のような低い電
圧でも、しゃ断器６内のガス絶縁部分で絶縁破壊を起こ
すことがある。The difference in the time of turning on the grounding device 12 brings about the following effects. That is, if the grounding device 12 is turned on after the gas pressure in the circuit breaker 6 has dropped, a voltage due to the electric charge remaining in the conductor 7 may cause dielectric breakdown in the gas insulating portion in the circuit breaker 6. Further, even if the grounding device 12 is turned on while the gas pressure in the breaker 6 is high, if the contactor of the breaker 2 remains open, the portion of the support member 3 that will be the floating electrode will not be exposed to time. When a little over, the electric charges accumulated in the capacitor 5 and the insulating support member 4 are collected and a slight voltage is generated. Since the gas pressure in the circuit breaker 6 is collected until a vacuum state of several Torr is reached, dielectric breakdown may occur in the gas insulating portion in the circuit breaker 6 even with the above low voltage.

【０００５】[0005]

【発明が解決しようとする課題】従来のガス絶縁開閉装
置は以上のように構成されているので、しゃ断器６を開
路後に断路器11を開離し、第１の密封容器１内の絶縁ガ
スを排出してしゃ断器６を内部点検する場合、導体７に
残留した電荷による電圧及び支持部材３に集まる電荷に
よる電圧のため、しゃ断器６内の絶縁スペーサ８や絶縁
支持部材４の絶縁物表面のガス中で絶縁破壊を生じて、
絶縁物表面の一部が炭化して痕跡を生じる。このことを
知らずに運転を再開していると、この部分の絶縁破壊が
進み絶縁破壊事故に至るという問題点があった。Since the conventional gas-insulated switchgear is constructed as described above, the circuit breaker 11 is opened after the circuit breaker 6 is opened, and the insulating gas in the first sealed container 1 is removed. When discharging and inspecting the circuit breaker 6 internally, due to the voltage due to the electric charge remaining in the conductor 7 and the voltage due to the electric charge collected in the supporting member 3, the insulating spacer 8 in the circuit breaker 6 and the insulating surface of the insulating supporting member 4 are not covered. Dielectric breakdown occurs in gas,
A part of the surface of the insulator is carbonized to generate a trace. If the operation is restarted without knowing this, there is a problem that the dielectric breakdown of this portion progresses and a dielectric breakdown accident occurs.

【０００６】また、しゃ断器６を開路後に断路器11を開
離し、第１の密封容器１内の絶縁ガスを排出する前に接
地装置12を投入してから、しゃ断器６の内部点検をすれ
ば上記のような絶縁破壊を生じないが、接地装置12の投
入を忘れた場合、上記と同様な絶縁事故が発生するとい
う問題があった。Further, after the circuit breaker 6 is opened, the circuit breaker 11 is opened, the grounding device 12 is turned on before the insulating gas in the first sealed container 1 is discharged, and then the inside of the circuit breaker 6 is checked. For example, although the insulation breakdown as described above does not occur, there is a problem that if the grounding device 12 is forgotten to be turned on, an insulation accident similar to the above occurs.

【０００７】この発明は上記のような問題点を解消する
ためになされたもので、絶縁物表面のガス中での絶縁破
壊を防止することができるガス絶縁開閉装置を得ること
を目的とする。The present invention has been made to solve the above problems, and an object thereof is to obtain a gas-insulated switchgear capable of preventing dielectric breakdown in the gas on the surface of an insulator.

【０００８】[0008]

【課題を解決するための手段】この発明に係るガス絶縁
開閉装置は、しゃ断器を開路後に断路器を開離し、第１
の密封容器内の絶縁ガスを排出してガス圧が所定値にな
れば検出信号を出す検出スイッチと、検出信号によって
接地装置の投入信号を出す第１の制御手段と、接地装置
の投入によってしゃ断器の投入信号を出力する第２の制
御手段とを設けた。A gas-insulated switchgear according to the present invention has a structure in which a disconnector is opened after a breaker is opened.
Of the insulating gas in the sealed container of FIG. 2 and a detection switch for outputting a detection signal when the gas pressure reaches a predetermined value, a first control means for outputting a closing signal of the grounding device according to the detection signal, and a cutoff by closing the grounding device. And a second control means for outputting a closing signal of the container.

【０００９】また、遮断器を開路後に断路器を開離し、
断路器が開離すると検出信号を出力する補助スイッチ
と、検出信号によって接地装置の投入信号を出す第１の
制御手段と、接地装置の投入によって遮断器の投入信号
を出力する第２の制御手段とを設けた。Further, after the circuit breaker is opened, the disconnector is opened.
An auxiliary switch that outputs a detection signal when the disconnector is opened, a first control means that outputs a closing signal of the grounding device based on the detection signal, and a second control means that outputs a closing signal of the circuit breaker by closing the grounding device. And.

【００１０】また、しゃ断器を開路後に断路器を開離
し、第１の密封容器内の絶縁ガスを排出するバルブを開
くと検出信号を出力する検出スイッチと、検出信号によ
って接地装置の投入信号を出力する第１の制御手段と、
接地装置の投入によって上記しゃ断器の投入信号を出力
する第２の制御手段とを設けた。Further, after the circuit breaker is opened, the circuit breaker is opened and the valve for discharging the insulating gas in the first sealed container is opened. First control means for outputting,
Second control means for outputting a closing signal of the circuit breaker when the grounding device is turned on is provided.

【００１１】また、しゃ断器を開路後に断路器を開離
し、第１の密封容器内の絶縁ガスを排出してガス圧が所
定値になれば検出信号を出す検出スイッチと、検出信号
によって接地装置の投入信号を出す制御手段とを設け
た。Further, after the circuit breaker is opened, the circuit breaker is opened, the insulating gas in the first sealed container is discharged, and a detection switch that outputs a detection signal when the gas pressure reaches a predetermined value, and a grounding device by the detection signal And a control means for issuing a closing signal.

【００１２】さらに、しゃ断器を開路後に断路器を開離
し、断路器が開離すると検出信号を出力する補助スイッ
チと、検出信号によって接地装置の投入信号を出す制御
手段とを設けた。Further, the circuit breaker is opened after the circuit breaker is opened, and an auxiliary switch for outputting a detection signal when the circuit breaker is opened, and a control means for outputting a grounding device closing signal according to the detection signal are provided.

【００１３】そして、しゃ断器を開路後に断路器を開離
し、第１の密封容器内の絶縁ガスを排出するバルブを開
くと検出信号を出力する検出スイッチと、検出信号によ
って接地装置の投入信号を出す制御手段とを設けた。Then, after the circuit breaker is opened, the disconnector is opened, and a detection switch for outputting a detection signal when the valve for discharging the insulating gas in the first sealed container is opened, and a signal for turning on the grounding device according to the detection signal. And a control means for outputting.

【００１４】[0014]

【作用】この発明におけるガス絶縁開閉装置は、しゃ断
器を開路後に断路器を開離し、第１の密封容器内の絶縁
ガスを排出してガス圧が所定値になれば検出信号を出力
する検出スイッチと、検出信号によって接地装置の投入
信号を出力する第１の制御手段と、接地装置の投入によ
ってしゃ断器の投入信号を出力する第２の制御手段とを
設けたので、しゃ断器内の導体に残留した電荷及び支持
部材に集まる電荷が接地装置を介して放電する。In the gas insulated switchgear according to the present invention, the circuit breaker is opened after the circuit breaker is opened, the insulating gas in the first sealed container is discharged, and a detection signal is output when the gas pressure reaches a predetermined value. Since the switch, the first control means for outputting the closing signal of the grounding device by the detection signal, and the second control means for outputting the closing signal of the breaker by closing the grounding device are provided, the conductor in the breaker is provided. The electric charges remaining in the electric field and the electric charges collected in the supporting member are discharged through the grounding device.

【００１５】また、しゃ断器を開路後に断路器を開離
し、断路器が開離すると検出信号を出力する補助スイッ
チと、検出信号によって接地装置の投入信号を出力する
第１の制御手段と、接地装置の投入によってしゃ断器の
投入信号を出力する第２の制御手段とを設けたので、し
ゃ断器内の導体に残留した電荷及び支持部材に集まる電
荷が接地装置を介して放電する。Further, the disconnecting switch is opened after the circuit breaker is opened, and an auxiliary switch for outputting a detection signal when the disconnecting switch is opened, a first control means for outputting a closing signal of the grounding device by the detection signal, and a ground Since the second control means for outputting the closing signal of the circuit breaker is provided when the device is turned on, the electric charge remaining in the conductor in the circuit breaker and the electric charge collected in the supporting member are discharged through the grounding device.

【００１６】また、しゃ断器を開路後に断路器を開離
し、第１の密封容器内の絶縁ガスを排出するバルブを開
くと検出信号を出力する検出スイッチと、検出信号によ
って接地装置の投入信号を出力する第１の制御手段と、
接地装置の投入によってしゃ断器の投入信号を出力する
第２の制御手段とを設けたので、しゃ断器内の導体に残
留した電荷及び支持部材に集まる電荷が接地装置を介し
て放電する。Further, after the circuit breaker is opened, the circuit breaker is opened and the valve for discharging the insulating gas in the first sealed container is opened. First control means for outputting,
Since the second control means for outputting the closing signal of the circuit breaker is provided by turning on the grounding device, the electric charge remaining in the conductor in the circuit breaker and the electric charge collected in the supporting member are discharged through the grounding device.

【００１７】また、しゃ断器を開路後に断路器を開離
し、第１の密封容器内の絶縁ガスを排出してガス圧が所
定値になれば検出信号を出す検出スイッチと、検出信号
によって接地装置の投入信号を出す制御手段を設けたの
で、しゃ断器内の導体に残留した電荷が接地装置を介し
て放電する。Further, after the circuit breaker is opened, the circuit breaker is opened, the insulating gas in the first sealed container is discharged, and a detection switch for outputting a detection signal when the gas pressure reaches a predetermined value, and a grounding device by the detection signal. Since the control means for outputting the closing signal is provided, the electric charge remaining on the conductor in the breaker is discharged through the grounding device.

【００１８】さらに、しゃ断器を開路後に断路器を開離
し、断路器が開離すると検出信号を出力する補助スイッ
チと、検出信号によって接地装置の投入信号を出す制御
手段を設けたので、しゃ断器内の導体に残留した電荷が
接地装置を介して放電する。Further, the circuit breaker is opened after the circuit breaker is opened, and an auxiliary switch for outputting a detection signal when the circuit breaker is opened, and a control means for outputting a closing signal of the grounding device by the detection signal are provided. The charges remaining on the conductors therein discharge through the grounding device.

【００１９】そして、しゃ断器を開路後に断路器を開離
し、第１の密封容器内の絶縁ガスを排出するバルブを開
くと検出信号を出力する検出スイッチと、検出信号によ
って接地装置の投入信号を出す制御手段を設けたので、
しゃ断器内の導体に残留した電荷が接地装置を介して放
電する。Then, after the circuit breaker is opened, the circuit breaker is opened, and a detection switch for outputting a detection signal when the valve for discharging the insulating gas in the first sealed container is opened, and a signal for turning on the grounding device according to the detection signal. Since we have a control means to output,
The residual charge on the conductor in the breaker discharges through the grounding device.

【００２０】[0020]

【実施例】実施例１．図１はこの発明の一実施例である
ガス絶縁開閉装置の構成図を示す。図において、１〜18
は従来装置と同一である。19は第１の密封容器１に設け
られ第１の密封容器１の絶縁ガスが所定の圧力になると
検出信号を出力する検出スイッチ、20は検出スイッチ19
の接点部、21は断路器11に構造的に連結され接触子10の
開離により接点が閉じる補助スイッチ、22は補助スイッ
チ21の接点部及び検出スイッチの接点部20に接続され検
出スイッチ19から出力された検出信号にもとづいて作動
するリレー、23は励磁により接点が閉じて回路がつなが
るリレー22の接点部である。EXAMPLES Example 1. FIG. 1 shows a block diagram of a gas-insulated switchgear according to an embodiment of the present invention. In the figure, 1-18
Is the same as the conventional device. Reference numeral 19 denotes a detection switch which is provided in the first sealed container 1 and which outputs a detection signal when the insulating gas in the first sealed container 1 reaches a predetermined pressure, and 20 denotes a detection switch 19
, 21 is an auxiliary switch structurally connected to the disconnector 11 and the contact is closed by opening the contactor 10, 22 is connected to the contact part of the auxiliary switch 21 and the contact part 20 of the detection switch, and from the detection switch 19 A relay 23, which operates based on the output detection signal, is a contact portion of the relay 22 whose contacts are closed by excitation to connect the circuit.

【００２１】リレー22の接点部23は図示されない第１の
制御手段に接続され、各々の接地装置12を投入する信号
または投入すべきことを警報する信号が出力される。24
は接地装置12に構造的に連結され接触子13の投入により
接点が閉じて回路がつながる接点部を有する補助スイッ
チ、25は補助スイッチ24の接点部に接続され接地装置12
の接触子13の投入によって作動するリレー、26は励磁に
より接点が閉じて回路がつながるリレー25の接点部であ
る。リレー25の接点部26は図示されない第２の制御手段
に接続され、しゃ断器６の各々のしゃ断部２の接触子を
投入する信号または投入すべきことを警報する信号が出
力される。The contact portion 23 of the relay 22 is connected to a first control means (not shown) and outputs a signal for turning on each grounding device 12 or a signal for warning that it should be turned on. twenty four
Is an auxiliary switch that is structurally connected to the grounding device 12 and has a contact portion that closes the contact when the contactor 13 is turned on to connect the circuit, and 25 is connected to the contact portion of the auxiliary switch 24 and the grounding device 12
A relay operated by turning on the contactor 13 is a contact portion of a relay 25 whose contacts are closed by excitation to connect the circuit. The contact portion 26 of the relay 25 is connected to a second control means (not shown), and a signal for turning on the contactor of each breaking portion 2 of the breaker 6 or a signal for warning that it should be turned on is output.

【００２２】前記のように構成されたガス絶縁開閉装置
におけるしゃ断器の内部点検を行う場合の動作について
説明する。最初にしゃ断器６の複数のしゃ断部２を開路
して通電電流を切った後に、断路器11の接触子10を開離
して、しゃ断器６を電気的に切離す。次に第１の密封容
器１内の絶縁ガスを排出するためにバルブ16にガス回収
装置17を接続し、バルブ16を開く。上記絶縁ガスが所定
の圧力になると検出スイッチ19が検出信号を出力し、リ
レー22を作動させ接点部23が閉じて、接点部23に接続さ
れた図示されない第１の制御手段は、各々の接地装置12
を投入する信号または投入すべきことを警報する信号を
出力する。The operation for inspecting the inside of the breaker in the gas insulated switchgear constructed as described above will be described. First, the plurality of breaking portions 2 of the breaker 6 are opened to cut off the energizing current, and then the contact 10 of the breaker 11 is opened to electrically separate the breaker 6. Next, in order to discharge the insulating gas in the first sealed container 1, a gas recovery device 17 is connected to the valve 16 and the valve 16 is opened. When the insulating gas reaches a predetermined pressure, the detection switch 19 outputs a detection signal, activates the relay 22 to close the contact portion 23, and the first control means (not shown) connected to the contact portion 23 is connected to each ground. Device 12
A signal for turning on or a signal for warning that it should be turned on is output.

【００２３】接地装置12の投入信号にもとづいて接地装
置12の接触子13が投入されると、導体７の残留電荷が接
地装置を介して放電されるとともに、補助スイッチの接
点部24が閉じる。接点部24が閉じるとリレー25が作動し
接点部26が閉じて、接点部26に接続された図示されない
第２の制御手段は、しゃ断器６を投入する信号または投
入すべきことを警報する信号を出力する。しゃ断器の投
入信号にもとづいてしゃ断器６の各々のしゃ断部２は投
入されると、支持部材３に集まった電荷が導体７、接触
子13を介して接地装置12へ放電される。従いしゃ断器６
内の絶縁部分で絶縁破壊を起こさない。When the contactor 13 of the grounding device 12 is turned on based on the turning-on signal of the grounding device 12, the residual charge of the conductor 7 is discharged through the grounding device and the contact portion 24 of the auxiliary switch is closed. When the contact portion 24 is closed, the relay 25 is activated and the contact portion 26 is closed, and the second control means (not shown) connected to the contact portion 26 is a signal for turning on the circuit breaker 6 or a signal for warning that the circuit breaker should be turned on. Is output. When each of the breaking portions 2 of the breaker 6 is closed based on the closing signal of the breaker, the electric charge collected in the supporting member 3 is discharged to the grounding device 12 via the conductor 7 and the contact 13. Follower 6
Dielectric breakdown does not occur at the insulation part inside.

【００２４】第１の密封容器１内の絶縁ガスは数Torrと
いった真空になるまで回収された後、点検口18を開き第
１の密封容器１内に十分空気を送り込み、しゃ断器６の
内部点検をする。After the insulating gas in the first hermetic container 1 is recovered to a vacuum of several Torr, the inspection port 18 is opened to supply sufficient air into the first hermetic container 1 to inspect the inside of the circuit breaker 6. do.

【００２５】実施例２．図２はこの発明の実施例２を示
すガス絶縁開閉装置の構成図を示す。図において、１〜
26は上記実施例１と同一である。但し、補助スイッチ21
は接触子10の開離により接点が閉じる接点部を有し断路
器11が開離されたことを検出する検出信号を出し、この
検出信号によってリレー22が作動する。Example 2. Second Embodiment FIG. 2 is a block diagram of a gas insulated switchgear showing a second embodiment of the present invention. In the figure,
26 is the same as that in the first embodiment. However, the auxiliary switch 21
Has a contact portion whose contact is closed when the contact 10 is opened, and outputs a detection signal for detecting that the disconnector 11 is opened, and the relay 22 is activated by this detection signal.

【００２６】前記のように構成されたガス絶縁開閉装置
におけるしゃ断器の内部点検を行う場合の動作について
説明する。最初に遮断器６の複数のしゃ断部２を開路し
て通電電流を切った後に断路器11の接触子10を開離する
と補助スイッチ21が閉じ検出信号を出力する。この検出
信号によってリレー22が作動し接点部23が閉じて、第１
の制御手段は各々の接地装置12を投入する信号または投
入すべきことを警報する信号を出力する。接地装置12の
投入信号にもとづいて接地装置12の接触子13が投入され
ると導体７の残留電荷が接地装置を介して放電されると
ともに、補助スイッチ24の接点部が閉じ、リレー25を作
動させ接点部26が閉じて、第２の制御手段がしゃ断器６
を投入する信号または投入すべきことを警報する信号を
出力する。しゃ断器の投入信号にもとづいてしゃ断器６
のしゃ断部２が投入されると、支持部材３に集まった電
荷が導体７、接触子13を介して接地装置12を介して放電
される。従い、しゃ断器６内の絶縁部分で絶縁破壊を起
こさない。The operation of inspecting the inside of the breaker in the gas insulated switchgear configured as described above will be described. First, when the contacts 10 of the disconnector 11 are opened after opening the plurality of breakers 2 of the circuit breaker 6 to cut off the energizing current, the auxiliary switch 21 closes and outputs a detection signal. This detection signal activates the relay 22 and closes the contact portion 23, so that the first
The control means outputs a signal for turning on each grounding device 12 or a signal for warning that it should be turned on. When the contact 13 of the grounding device 12 is turned on based on the closing signal of the grounding device 12, the residual charge of the conductor 7 is discharged through the grounding device, and the contact portion of the auxiliary switch 24 is closed to operate the relay 25. Then, the contact portion 26 is closed, and the second control means operates the circuit breaker 6.
A signal for turning on or a signal for warning that it should be turned on is output. Circuit breaker 6 based on breaker turn-on signal
When the cut-off portion 2 is turned on, the electric charge collected in the support member 3 is discharged through the conductor 7, the contact 13 and the grounding device 12. Therefore, no insulation breakdown occurs in the insulating portion of the breaker 6.

【００２７】この後、第１の密封容器１内の絶縁ガスを
バルブ16を開けてガス回収装置17に回収後、点検口18を
開けて十分空気を送り込み、しゃ断器６の内部点検をす
る。After that, the insulating gas in the first sealed container 1 is collected in the gas collecting device 17 by opening the valve 16, and then the inspection port 18 is opened to supply sufficient air to inspect the inside of the breaker 6.

【００２８】実施例３．図３はこの発明の実施例３を示
すガス絶縁開閉装置の構成図、図４はバルブの構成を示
す図である。１〜26は上記実施例１と同一である。27は
バルブ16が開くと検出信号を出力する検出スイッチで、
例えばリミットスイッチとか光電スイッチなどが用いら
れる。前記のように構成されたガス絶縁開閉装置におけ
るしゃ断器の内部点検を行う場合の動作については、上
記実施例１のガス圧力の検出スイッチ19とその接点部20
の作動のところが、バルブ16を開くと検出スイッチ27が
検出信号を出力しリレー22以下の動作につながる以外
は、実施例１と同一である。Example 3. Third Embodiment FIG. 3 is a block diagram of a gas insulated switchgear showing a third embodiment of the present invention, and FIG. 4 is a diagram showing a valve configuration. 1 to 26 are the same as those in the above-described first embodiment. 27 is a detection switch that outputs a detection signal when the valve 16 opens,
For example, a limit switch or a photoelectric switch is used. Regarding the operation for inspecting the inside of the circuit breaker in the gas insulated switchgear configured as described above, the gas pressure detection switch 19 and its contact portion 20 of the first embodiment are described.
The operation of (1) is the same as that of the first embodiment except that when the valve 16 is opened, the detection switch 27 outputs a detection signal and leads to the operation of the relay 22 and below.

【００２９】実施例４．図５はこの発明の実施例４を示
すガス絶縁開閉装置の構成図である。１〜23は上記実施
例１と同一である。図において、28は第１の密封容器１
内に配設され互いに接離可能に対向して設けられた一対
の接触子を有するしゃ断部である。なお、第１の密封容
器１、絶縁支持部材４、しゃ断部28でしゃ断器29が構成
されている。なお、上記実施例１における支持部材３、
分圧コンデン５が存在しないので、遮断部28の接触子を
投入する信号または投入すべきことを警報する信号を出
す制御手段及び接地装置12に構造的に連結される補助ス
イッチ24、補助スイッチ24の検出信号により作動するリ
レー25、接点部26は備えていない。Example 4. FIG. 5 is a configuration diagram of a gas-insulated switchgear showing a fourth embodiment of the present invention. 1 to 23 are the same as those in the first embodiment. In the figure, 28 is the first sealed container 1
The interrupting portion has a pair of contacts disposed inside and facing each other so as to be able to come into contact with and separate from each other. The first hermetic container 1, the insulating support member 4, and the interrupting portion 28 constitute an interrupter 29. In addition, the support member 3 in the first embodiment,
Since the voltage dividing condenser 5 does not exist, the auxiliary switch 24 and the auxiliary switch 24 structurally connected to the control means and the grounding device 12 for issuing a signal for closing the contact of the breaker 28 or a signal for warning that the contact should be closed. The relay 25 and the contact portion 26 which are operated by the detection signal of are not provided.

【００３０】前記のように構成された我鵜絶縁開閉装置
におけるしゃ断器の内部点検を行う場合の動作について
説明する。最初にしゃ断器29のしゃ断部28を開路して通
電電流を切った後に、断路器11の接触子10を開離して、
しゃ断器29を電気的に切離す。次に第１の密封容器１内
の絶縁ガスを排出するためにバルブ16にガス回収装置17
を接続し、バルブ16を開く。上記絶縁ガスが所定の圧力
になると検出スイッチ19が検出信号を出力し、リレー22
を動作させ接点部23を閉じて、接点部23に接続された図
示されない制御手段は、各々の接地装置12を投入する信
号または投入すべきことを警報する信号を出力する。The operation for inspecting the inside of the circuit breaker in the cormorant insulated switchgear configured as described above will be described. First, the breaking portion 28 of the breaker 29 is opened to cut off the energizing current, and then the contact 10 of the breaker 11 is opened.
Electrically disconnect the circuit breaker 29. Next, in order to discharge the insulating gas in the first sealed container 1, the valve 16 is provided with a gas recovery device 17.
Connect and open valve 16. When the insulating gas reaches a predetermined pressure, the detection switch 19 outputs a detection signal and the relay 22
Is operated to close the contact portion 23, and a control means (not shown) connected to the contact portion 23 outputs a signal for turning on each grounding device 12 or a signal for warning that it should be turned on.

【００３１】接地装置12の投入信号にもとづいて接地装
置12の接触子13が投入されると、導体７の残留電荷が接
地装置12を介して放電される。従いしゃ断器29内の絶縁
部分で絶縁破壊を起こさない。第１の密封容器１内の絶
縁ガスは数Torrといった真空になるまで回収された後、
点検口18を開き第１の密封容器１内に十分空気を送り込
み、しゃ断器29の内部点検をする。When the contact 13 of the grounding device 12 is turned on based on the closing signal of the grounding device 12, the residual charge of the conductor 7 is discharged through the grounding device 12. Therefore, insulation breakdown does not occur at the insulation part in the circuit breaker 29. After the insulating gas in the first sealed container 1 is collected until it becomes a vacuum of several Torr,
The inspection port 18 is opened and sufficient air is sent into the first sealed container 1 to inspect the inside of the breaker 29.

【００３２】実施例５．図６はこの発明の実施例５を示
すガス絶縁開閉装置の構成図を示す。１〜29は実施例２
及び実施例４と同一であり、同じ符号のものは実施例２
及び実施例４と同じ動作をする。即ち、しゃ断器29の開
路後、断路器11の接触子10の開離によって補助スイッチ
21が閉じて検出信号を出す。この検出信号によってリレ
ー22が作動し接点部23が閉じて、図示されない制御手段
は接地装置12を投入する信号または投入すべきことを警
報する信号を出力する。この投入信号にもとづいて接地
装置12の接触子13が投入されると、導体７の残留電荷が
接地装置12を介して放電される。従いしゃ断器29内の絶
縁部分で絶縁破壊を起こさない。Example 5. FIG. 6 is a block diagram of a gas insulated switchgear showing a fifth embodiment of the present invention. Examples 1 to 29 are Example 2
And Embodiment 4, and the same reference numerals are used in Embodiment 2.
And the same operation as in the fourth embodiment. That is, after the breaker 29 is opened, the auxiliary switch is opened by opening the contact 10 of the disconnector 11.
21 closes and outputs a detection signal. The relay 22 is actuated by this detection signal to close the contact portion 23, and the control means (not shown) outputs a signal for turning on the grounding device 12 or a signal for warning that the grounding device 12 should be turned on. When the contact 13 of the grounding device 12 is closed based on this closing signal, the residual charge of the conductor 7 is discharged through the grounding device 12. Therefore, insulation breakdown does not occur at the insulation part in the circuit breaker 29.

【００３３】実施例６．図７はこの発明の実施例６を示
すガス絶縁開閉装置の構成図を示す。１〜29は実施例３
及び実施例４と同一であり、同じ符号のものは実施例３
及び実施例４と同じ動作をする。即ち、しゃ断器29の開
路後、断路器11を開離してバルブ16を開くと検出スイッ
チ27が検出信号を出す。この検出信号によってリレー22
が作動し、接点部23が閉じて、図示されない制御手段は
接地装置12を投入する信号または投入すべきことを警報
する信号を出力する。この投入信号に基づいて接地装置
12の接触子13が投入されると、導体７の残留電荷が接地
装置12を介して放電される。従いしゃ断器29内の絶縁部
分で絶縁破壊を起こさなない。Example 6. 7 is a block diagram of a gas insulated switchgear showing a sixth embodiment of the present invention. Examples 1 to 29 are Example 3
And Embodiment 4 and the same reference numerals are used in Embodiment 3.
And the same operation as in the fourth embodiment. That is, after the circuit breaker 29 is opened, the disconnector 11 is opened and the valve 16 is opened, and the detection switch 27 outputs a detection signal. This detection signal causes relay 22
Is activated, the contact portion 23 is closed, and the control means (not shown) outputs a signal for turning on the grounding device 12 or a signal for warning that the grounding device 12 should be turned on. Grounding device based on this input signal
When the 12 contacts 13 are turned on, the residual charge of the conductor 7 is discharged via the grounding device 12. Therefore, no insulation breakdown occurs in the insulation part of the circuit breaker 29.

【００３４】[0034]

【発明の効果】以上のように、この発明によれば所定ガ
ス圧を検出する検出スイッチと、接地装置の投入信号を
出力する第１の制御手段と、しゃ断器の投入信号を出力
する第２の制御手段とを設けたので、絶縁ガス排出後に
おいてもしゃ断器内の導体及び支持部材の電荷が接地装
置を介して放電され、絶縁物表面のガス中での絶縁破壊
を防止することができる効果がある。As described above, according to the present invention, the detection switch for detecting the predetermined gas pressure, the first control means for outputting the closing signal of the grounding device, and the second for outputting the closing signal of the circuit breaker. Since the electric charge of the conductor and the supporting member in the circuit breaker is discharged through the grounding device even after the insulating gas is discharged, it is possible to prevent the dielectric breakdown in the gas on the surface of the insulator. effective.

【００３５】また、この発明によれば断路器を開離した
ことを検出する補助スイッチと、接地装置の投入信号を
出力する第１の制御手段と、しゃ断器の投入信号を出力
する第２の制御手段とを設けたので、断路器の開離に伴
って接地装置の投入が行われるので、しゃ断器内の導体
及び支持部材の電荷を接地装置へ放電し、絶縁物表面の
ガス中での絶縁破壊を防止することができる効果があ
る。According to the invention, the auxiliary switch for detecting the disconnection of the disconnecting switch, the first control means for outputting the closing signal of the grounding device, and the second control means for outputting the closing signal of the circuit breaker. Since the control means is provided, the grounding device is turned on along with the disconnection of the disconnecting switch, so that the electric charges of the conductor and the supporting member in the circuit breaker are discharged to the grounding device, and the This has the effect of preventing dielectric breakdown.

【００３６】また、この発明によれば絶縁ガスを排出す
るためのバルブが開かれたことを検出する検出スイッチ
と、接地装置の投入信号を出力する第１の制御手段と、
しゃ断器の投入信号を出力する第２の制御手段とを設け
たので、バルブを開く操作に伴って接地装置の投入が行
われるので、しゃ断器内の導体及び支持部材の電荷を接
地装置へ放電し、絶縁物表面のガス中での絶縁破壊を防
止することができる効果がある。Further, according to the present invention, a detection switch for detecting that the valve for discharging the insulating gas is opened, and a first control means for outputting a closing signal of the grounding device,
Since the second control means for outputting the closing signal of the circuit breaker is provided, the grounding device is closed with the operation of opening the valve, so that the electric charges of the conductor and the supporting member in the circuit breaker are discharged to the grounding device. However, there is an effect that the dielectric breakdown in the gas on the surface of the insulator can be prevented.

【００３７】また、この発明によれば所定ガスを検出す
る検出スイッチと、接地装置の投入信号を出力する制御
手段を設けたので、絶縁ガス排出後においても、しゃ断
器内の導体の電荷が接地装置を介して放電され、絶縁物
表面のガス中での絶縁破壊を防止できる効果がある。Further, according to the present invention, since the detection switch for detecting the predetermined gas and the control means for outputting the closing signal of the grounding device are provided, the electric charge of the conductor in the breaker is grounded even after the insulating gas is discharged. It has the effect of preventing the dielectric breakdown in the gas on the surface of the insulator that is discharged through the device.

【００３８】さらに、この発明によれば断路器を開離し
たことを検出する補助スイッチと、接地装置の投入信号
を出力する制御手段とを設けたので、断路器の開離に伴
って接地装置の投入が行われるので、しゃ断器内の導体
の電荷が接地装置を介して放電され、絶縁物表面のガス
中での絶縁破壊を防止できる効果がある。Further, according to the present invention, since the auxiliary switch for detecting the disconnection of the disconnecting switch and the control means for outputting the closing signal of the grounding device are provided, the grounding device is connected with the disconnecting of the disconnecting switch. Is carried out, the electric charge of the conductor in the breaker is discharged through the grounding device, and there is an effect that dielectric breakdown in the gas on the surface of the insulator can be prevented.

【００３９】そして、この発明によれば絶縁ガスを排出
するためのバルブが開かれたことを検出する検出スイッ
チと、接地装置の投入信号を出力する制御手段を設けた
ので、バルブを開く操作に伴って接地装置の投入が行わ
れるので、しゃ断器内の導体の電荷が接地装置を介して
放電され、絶縁物表面のガス中での絶縁破壊を防止する
ことができる効果がある。Further, according to the present invention, since the detection switch for detecting the opening of the valve for discharging the insulating gas and the control means for outputting the closing signal of the grounding device are provided, it is possible to open the valve. Since the grounding device is turned on along with it, the electric charge of the conductor in the circuit breaker is discharged through the grounding device, and there is an effect that dielectric breakdown in the gas on the surface of the insulator can be prevented.

【図面の簡単な説明】[Brief description of drawings]

【図１】この発明の実施例１を示すガス絶縁開閉装置の
構成図である。FIG. 1 is a configuration diagram of a gas insulated switchgear showing a first embodiment of the present invention.

【図２】この発明の実施例２を示すガス絶縁開閉装置の
構成図である。FIG. 2 is a configuration diagram of a gas insulated switchgear showing a second embodiment of the present invention.

【図３】この発明の実施例３を示すガス絶縁開閉装置の
構成図である。FIG. 3 is a configuration diagram of a gas-insulated switchgear showing a third embodiment of the present invention.

【図４】この発明の実施例３に使用しているバルブの構
成図である。FIG. 4 is a configuration diagram of a valve used in a third embodiment of the present invention.

【図５】この発明の実施例４を示すガス絶縁開閉装置の
構成図である。FIG. 5 is a configuration diagram of a gas-insulated switchgear showing a fourth embodiment of the present invention.

【図６】この発明の実施例５を示すガス絶縁開閉装置の
構成図である。FIG. 6 is a configuration diagram of a gas-insulated switchgear showing a fifth embodiment of the present invention.

【図７】この発明の実施例６を示すガス絶縁開閉装置の
構成図である。FIG. 7 is a configuration diagram of a gas-insulated switchgear showing a sixth embodiment of the present invention.

【図８】従来のガス絶縁開閉装置の構成図である。FIG. 8 is a configuration diagram of a conventional gas-insulated switchgear.

【符号の説明】[Explanation of symbols]

１ 第１の密封容器 ６ しゃ断器 ７ 導体 11 断路器 12 接地装置 19 検出スイッチ 21 補助スイッチ 29 しゃ断器 1 First sealed container 6 Circuit breaker 7 Conductor 11 Disconnector 12 Grounding device 19 Detection switch 21 Auxiliary switch 29 Circuit breaker

Claims (6)

【特許請求の範囲】[Claims] 【請求項１】 絶縁ガスを充填した第１の密封容器に配
設され互いに接離可能に対向して設けられた一対の接触
子を有する複数のしゃ断部を直列に接続したしゃ断器
と、このしゃ断器の各々の導出端子に電気的に接続され
る導体と、絶縁ガスを充填した第２の密封容器に配設さ
れ一極側が上記導体に接続され他極側が他の機器に接続
され、上記しゃ断器が開路後に開離する断路器と、上記
導体に接続された接地装置とを備え、上記しゃ断器が開
路後に上記断路器を開離し、上記第１の密封容器内の絶
縁ガスを排出して上記しゃ断器を内部点検するようにし
たガス絶縁開閉装置において、 上記第１の密封容器内のガス圧が所定値になれば検出信
号を出力する検出スイッチと、上記検出信号によって上
記接地装置の投入信号を出す第１の制御手段と、上記接
地装置の投入によって上記しゃ断器の投入信号を出す第
２の制御手段とを設けたことを特徴とするガス絶縁開閉
装置。1. A circuit breaker having a plurality of circuit breakers connected in series, the circuit breaker having a pair of contacts arranged in a first hermetically sealed container filled with an insulating gas and facing each other so as to be able to contact and separate from each other. A conductor electrically connected to each lead-out terminal of the circuit breaker and a second sealed container filled with an insulating gas, one pole side of which is connected to the conductor and the other pole side of which is connected to another device, The circuit breaker includes a disconnector that opens after opening, and a grounding device that is connected to the conductor. The circuit breaker opens the disconnector after opening and discharges the insulating gas in the first sealed container. In the gas-insulated switchgear for inspecting the circuit breaker internally, a detection switch for outputting a detection signal when the gas pressure in the first sealed container reaches a predetermined value, and the grounding device for the grounding device according to the detection signal. First control means for issuing a closing signal The gas insulated switchgear, characterized in that provided a second control means for issuing a on signal of the breaker after the input of the ground device. 【請求項２】 絶縁ガスを充填した第１の密封容器に配
設され互いに接離可能に対向して設けられた一対の接触
子を有する複数のしゃ断部を直列に接続したしゃ断器
と、このしゃ断器の各々の導出端子に電気的に接続され
る導体と、絶縁ガスを充填した第２の密封容器に配設さ
れ一極側が上記導体に接続され他極側が他の機器に接続
され、上記しゃ断器が開路後に開離する断路器と、上記
導体に接続された接地装置とを備え、上記しゃ断器が開
路後に上記断路器を開離して上記しゃ断器を内部点検す
るようにしたガス絶縁開閉装置において、 上記断路器が開離すると検出信号を出力する補助スイッ
チと、上記検出信号によって上記接地装置の投入信号を
出す第１の制御手段と、上記接地装置の投入によって上
記しゃ断器の投入信号を出す第２の制御手段とを設けた
ことを特徴とするガス絶縁開閉装置。2. A circuit breaker having a plurality of circuit breakers connected in series and having a pair of contacts arranged in the first hermetically sealed container filled with an insulating gas and facing each other so as to be able to contact and separate from each other. A conductor electrically connected to each lead-out terminal of the circuit breaker and a second sealed container filled with an insulating gas, one pole side of which is connected to the conductor and the other pole side of which is connected to another device, A gas-insulated switch with a circuit breaker that opens after the circuit breaker opens and a grounding device that is connected to the conductor, and that opens the circuit breaker after the circuit breaker opens to inspect the circuit breaker internally. In the device, an auxiliary switch that outputs a detection signal when the disconnector is opened, a first control unit that outputs a closing signal of the grounding device by the detection signal, and a closing signal of the breaker by closing the grounding device. Second to issue Gas insulated switchgear is characterized by providing a control means. 【請求項３】 絶縁ガスを充填した第１の密封容器に配
設され互いに接離可能に対向して設けられた一対の接触
子を有する複数のしゃ断部を直列に接続したしゃ断器
と、このしゃ断器の各々の導出端子に電気的に接続され
る導体と、絶縁ガスを充填した第２の密封容器に配設さ
れ一極側が上記導体に接続され他極側が他の機器に接続
され、上記しゃ断器が開路後に開離する断路器と、上記
導体に接続された接地装置とを備え、上記しゃ断器が開
路後に上記断路器を開離して上記しゃ断器を内部点検す
るようにしたガス絶縁開閉装置において、 上記第１の密封容器内に連通した上記第１の密封容器内
のガスを排出するバルブと、このバルブを開くと検出信
号を出力する検出スイッチと、上記検出信号によって上
記接地装置の投入信号を出す第１の制御手段と、上記接
地装置の投入によって上記しゃ断器の投入信号を出す第
２の制御手段とを設けたことを特徴とするガス絶縁開閉
装置。3. A circuit breaker having a plurality of circuit breakers connected in series, the circuit breaker having a pair of contacts arranged in the first hermetically sealed container filled with an insulating gas and facing each other so as to be able to contact and separate from each other. A conductor electrically connected to each lead-out terminal of the circuit breaker and a second sealed container filled with an insulating gas, one pole side of which is connected to the conductor and the other pole side of which is connected to another device, A gas-insulated switch with a circuit breaker that opens after the circuit breaker opens and a grounding device that is connected to the conductor, and that opens the circuit breaker after the circuit breaker opens to inspect the circuit breaker internally. In the device, a valve for discharging gas in the first hermetic container communicating with the first hermetic container, a detection switch for outputting a detection signal when the valve is opened, and a grounding device for the grounding device according to the detection signal. First to issue a closing signal Control means and the gas insulated switchgear is characterized by providing a second control means for issuing a on signal of the breaker after the input of the ground device. 【請求項４】 絶縁ガスを充填した第１の密封容器に配
設され互いに接離可能に対向して設けられた一対の接触
子を有するしゃ断部を有するしゃ断器と、このしゃ断器
の各々の導出端子に電気的に接続される導体と、絶縁ガ
スを充填した第２の密封容器に配設され一極側が上記導
体に接続され他極側が他の機器に接続され、上記しゃ断
器が開路後に開離する断路器と、上記導体に接続された
接地装置とを備え、上記しゃ断器が開路後に上記断路器
を開離し、上記第１の密封容器内の絶縁ガスを排出して
上記しゃ断器を内部点検するようにしたガス絶縁開閉装
置において、 上記第１の密封容器内のガス圧が所定値になれば検出信
号を出力する検出スイッチと、上記検出信号によって上
記接地装置の投入信号を出す制御手段を設けたことを特
徴とするガス絶縁開閉装置。4. A circuit breaker having a circuit breaker disposed in a first hermetically sealed container filled with an insulating gas and having a pair of contacts provided so as to be able to come into contact with and separate from each other, and each of the circuit breakers. A conductor electrically connected to the lead-out terminal and arranged in a second sealed container filled with insulating gas, one pole side is connected to the conductor and the other pole side is connected to another device, and the circuit breaker is opened. A disconnecting switch which is opened and a grounding device which is connected to the conductor are provided, the disconnecting switch is opened after the disconnecting circuit is opened, and the insulating gas in the first sealed container is discharged to discharge the disconnecting circuit. In a gas-insulated switchgear for internal inspection, a detection switch that outputs a detection signal when the gas pressure in the first sealed container reaches a predetermined value, and a control that outputs a closing signal for the grounding device based on the detection signal. Characterized by the provision of means That the gas insulated switchgear. 【請求項５】 絶縁ガスを充填した第１の密封容器に配
設され互いに接離可能に対向して設けられた一対の接触
子を有するしゃ断部を有するしゃ断器と、このしゃ断器
の各々の導出端子に電気的に接続される導体と、絶縁ガ
スを充填した第２の密封容器に配設され一極側が上記導
体に接続され他極側が他の機器に接続され、上記しゃ断
器が開路後に開離する断路器と、上記導体に接続された
接地装置とを備え、上記しゃ断器が開路後に上記断路器
を開離して上記しゃ断器を内部点検するようにしたガス
絶縁開閉装置において、 上記断路器が開離すると検出信号を出力する補助スイッ
チと、上記検出信号によって上記接地装置の投入信号を
出す制御手段とを設けたことを特徴とするガス絶縁開閉
装置。5. A circuit breaker having a circuit breaker provided in a first hermetically sealed container filled with an insulating gas, the circuit breaker having a pair of contacts provided to face each other so as to be capable of contacting and separating, and each of the circuit breakers. A conductor electrically connected to the lead-out terminal and arranged in a second sealed container filled with insulating gas, one pole side is connected to the conductor and the other pole side is connected to another device, and the circuit breaker is opened. A gas-insulated switchgear comprising a disconnecting switch to be disconnected and a grounding device connected to the conductor, wherein the circuit breaker is opened to inspect the circuit breaker internally after the circuit breaker is opened. A gas-insulated switchgear comprising: an auxiliary switch that outputs a detection signal when the container is opened, and a control unit that outputs a closing signal of the grounding device according to the detection signal. 【請求項６】 絶縁ガスを充填した第１の密封容器に配
設され互いに接離可能に対向して設けられた一対の接触
子を有する遮断部を有するしゃ断器と、このしゃ断器の
各々の導出端子に電気的に接続される導体と、絶縁ガス
を充填した第２の密封容器に配設され一極側が上記導体
に接続され他極側が他の機器に接続され、上記しゃ断器
が開路後に開離する断路器と、上記導体に接続された接
地装置とを備え、上記しゃ断器が開路後に上記断路器を
開離して上記しゃ断器を内部点検するようにしたガス絶
縁開閉装置において、 上記第１の密封容器内に連通し上記第１の密封容器内の
ガスを排出するバルブと、このバルブを開くと検出信号
を出力する検出スイッチと、上記検出信号によって上記
接地装置の投入信号を出す制御手段とを設けたことを特
徴とするガス絶縁開閉装置。6. A circuit breaker having a circuit breaker disposed in a first hermetically sealed container filled with an insulating gas and having a pair of contacts provided so as to be able to come into contact with and separate from each other, and each of the circuit breakers. A conductor electrically connected to the lead-out terminal and arranged in a second sealed container filled with insulating gas, one pole side is connected to the conductor and the other pole side is connected to another device, and the circuit breaker is opened. A gas-insulated switchgear comprising a disconnecting switch to be disconnected and a grounding device connected to the conductor, wherein the circuit breaker disconnects the disconnector after the circuit is opened to inspect the circuit breaker internally. A valve communicating with the first sealed container to discharge the gas in the first sealed container, a detection switch that outputs a detection signal when the valve is opened, and a control that outputs a closing signal of the grounding device by the detection signal. And means Gas insulated switchgear according to claim.